bug1056857-Part 1: added developer checkbox for ignoring GPS. r=ehung

This is just the GUI side, the other parts of this bug are implementation of this.
Bug 1062317 - tutorial-bookmark-migration-tiny string landed with the wrong text
Bug 1061267 - Hide message for unverified account by default r=arthurcc.
Merge pull request #23591 from guilherme-pg/bug1061267-offline-unverified

Bug 1061267 - Hide message for unverified account by default r=arthurcc.
Merge pull request #23679 from TheoChevalier/bug1062317-bookmark-migration

Bug 1062317 - tutorial-bookmark-migration-tiny string landed with the wr...
Merge pull request #23388 from garvankeeley/bug1056857

bug1056857-Part 1: added developer checkbox for ignoring GPS. r=ehung